Unusual Cleavage of N-N Bond of 1-Arylamino-1,2,3-triazole Derivatives: A Simple and Alternate Approach to 4,5-Disubstituted-1H-1,2,3-triazoles

In this communication, the authors described the synthesis of 1-arylamino-1,2,3-triazole derivatives via diazo transfer reaction on active methylene hydrazones. Further, we have observed the reduction of 1-arylamino-1,2,3-triazole using Pd/C, H2 to result in unusual N-N bond cleavage to give 4,5-disubstituted-1H-1,2,3-triazole.